The battle that began in another world is now a war waged on Earth.

女警 Yeon-hwa 正在调查警队内部的一宗案件，警方怀疑警察队长的太太与骗徒Poong-sik有秘密来往，于是Yeon-hwa开始对Poong-sik展开调查。她先到Poong-sik所任职的医院，扮作是院内的病人。当 Yeon-hwa不断搜集证据的同时，发现Poong-sik原来在舞坛相当活跃。而Yeon-hwa为求找紧每个调查机会，不惜学习跳舞，试图与Poong-sik接触。可是在不知不觉间，Yeon-hwa爱上了自己的调查对象 … …

Prom Pact is set at the height of prom season. High school senior Mandy Coleman and her best friend and fellow outsider Ben are surrounded by over-the-top '80s-themed Promposals. However, Mandy keeps her eyes focused on a different goal: her lifelong dream of attending Harvard. When she finds out her acceptance has been deferred, she is determined to do whatever she can do to get herself off the waitlist, even if that means asking for help from the one person she abhors - popular all-star jock Graham Lansing, whose father is a powerful senator and Harvard alum. Once Mandy becomes Graham's tutor, she begins to realize there's more to him than she thought and perhaps something more to life than Harvard.

从小由母亲独自抚养长大的高中生元卓（李玟雨 饰），性格孤僻又叛逆。因行骗罪入狱多年的父亲英奎（林河龙 饰）一直是他幼小心灵里抹不去的伤痛，元卓一直拒绝去监狱探望爸爸，即使在心底元卓依旧深爱着他。本想出狱后洗心革面，重新做一名好父亲的英奎，却在刑满释放的前一天发生了意外。英奎被黑帮老大张锡朝（金相中 饰）强迫参加危险系数极高的游戏“足棒球”，结果因脑震荡而突然猝死。所有的生机和期待瞬间破灭后，英奎恳求天使再给自己一次履行父亲职责的机会。在英奎的苦苦哀求下，天使满足了他的要求，却阴错阳差地把英奎的灵魂附到了元卓高中同学东勋（河东勋 饰）的身上。从此英奎就以东勋的身份，开始了成为元卓保护天使的校园生活。